Serrating-machine.



No. 794,810. PATBNTED JULY 18, 1905.

` R. P. MASSA.

SERRATING MACHINE.

APPLICATION FILED MAB.17,1905.

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No. 794,810. PATBNTED JULY 18, 1905.

y R. F. MASSA.

SBRRATING MACHINE.

APPLICATION FILED MAB.. 17, 1905.

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APPLIOATION FILED MAR. 17, 1905.

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No. I794,810.

UNTTED STATES l Patented July 18, 1905.

PATENT OFFICE.

ROBERT F. MASSA, OF CHICAGO, ILLINOIS, ASSIGN OR TO INTERNATIONALHARVESTER COMPANY, A CORPORATION OF NEW JERSEY.

SERRATlNG-IVIACHINE..

SPECIFICATION forming part of Letters Patent No. 794,810, dated July 18,1905. Application liled March 17, 1905. Serial No. 250,551.

To a/ZZ 1071/0717/ it may concern.-

Be it known that I, ROBERT F. MAssA, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented a new and useful Improvement in Serrating-Machines, of whichthe followingis a complete specification.

This invention relates to the class of machines employed in imparting aserrated effect to the margins of harvester-knife Sections and the like,its application being made in this instance to a machine which serratesthe cutting' edges of ledger or guard plates. Heretofore in suchmachines independent hammerhelves, each carrying a suitableserrating-tool, were made to operate on the cutting edges of theknife-sections; but since these serratingtools were required to move inconvergent 1ines,and thus made to approach the apex of the section orledger-plate being operated upon, interference of the tools would resultif their advance was simultaneous. It was therefore found necessary tomake them advance successively instead of simultaneously upon theirwork. In practice, however, the tool on one side of the knife-section orledger-plate was started suiiiciently in advance of the one on the otherside to permit it to complete its work and withdraw in time to preventinterference with the other hammer.

The above-mentioned difiiculties resulted'in a machine of a morecomplicated construction and of a lessened capacity, because the twosides of the ledger-plate or section could not be operated upon whollysimultaneously. These objections I have overcome by securing twoserrating-tools of a special construction to a single hammer-helve.

Referring to the accompanying drawings, Figure l represents a plan viewof a serratingmachine in which is embodied my invention. Fig. 2 is aside elevation of same, the stand or support upon which the machine isplaced being omitted. Fig. 3 is an enlarged detail plan of thehammer-belve, and Fig. 4 represents a side elevation of same. Figs. 5,6, and 7 are detail views of the base on which the ledger-plate issupported during the operation thereon, being a plan, a side elevation,

l and an end elevation, respectively. Fig. 8

represents a detail view, partly in section, of one of the stocks whichhold the serratingtools. Fig. 9 represents an enlarged plan of aledger-plate with diagrammatic views of the serrating-tools shownthereon; and Fig. 10 is a transverse section of same, taken on the planeindicated by the line 10.10 in Fig. 9. Fig. ll represents a sideelevation of the spring-actuated arm for holding in position theledger-plates, the foot-lever for operating said arm, and the connectingmechanism interposed therebetween. Fig. 12 is a front elevation of thehammer-lift and hand-lever on which said lift is mounted, thehammerhelve being shown in section; and Fig. 13 shows a view similar toFig. 9 with the pins on the ledger-plate more clearly shown, so situatedas to provide for the necessary small degree of lateral movement of theledgerplate which is required in order to accurately adjust to the bitsof the serrating-tool.

As the invention consists, essentially, in the provision of meanswhereby both sides of the ledger-plate are operated upon simultaneously,only a brief general description of the other parts not directlyconcerned will be given. For a knowledge of the detail construction andoperation of a serrating-machine of the type herein shown reference ismade to Patent N o. 640,529, granted to Chris Borg January 2, 1900,serrating-machine.

In the drawings, l designates the base-support, and 2 the base-platesecured to the upper surface thereof. On the base-plate 2 are fixed thelongitudinally-extending guides 3, which, with said base-plate,constitute a way in which the carriage 4 is guided in its reciprocatingmovement. On the carriage 4 is mounted the cross-shaft 5, journaling inthe bearings 6 and having secured to its projecting end the drive-pulley7, the shaft 5 and driving-pulley moving, of course, with the carriage4; but sincethe belt which engages this pulley leads to a shaft directlyoverhead the slight reciprocating movement will not materially affectthe tension of the driving-belt. On the forward end of the driving-shaft5 is rigidly secured the bevel-gear 8, which meshes with and drives thebevel-pinion 9 on the leadscrew 10. This lead-screw 10l journals insuitable bearings 11, which are fixed to the carriage 4, and engages onits under side the halfnut 12. This half-nut is fixed with respect tolongitudinal movement, but provided with means for engaging anddisengaging it from i riage.

the said lead-screw, it being apparent that since the lead-screw has arotary movement whenever the half-nut engages same a longitudinalmovement will be imparted to the car- As the means for actuating thehalfnut 12 is not pertinent in this connection, details thereof havebeen omitted.

The driving-pulley 7 is provided with the clutch-teeth 7', and on theshaft 5 is feathered the clutch-sleeve 13. Pivoted in a suitable bearingon the carriage 4 at the point 14' is the clutch-engaging lever 14, andwith a pivotal axis at 15 is the hand-lever 15 for controlling saidclutch-lever. A link 16 connects the hand-lever 15 with the clutch-lever14. The coil expansion-spring 17, bearing against the hand-lever 15,exerts a pressure tending to hold the clutch-sleeve 13 out of engagementwith the pulley 7 as will be apparent from an inspection of Fig. 1.

In Fig. 1 the carriage 4 is shown in its farthest position forward, andto return same to its initial position or position of starting the blockor half-nut 12 is depressed and the tension-spring 18 pulls the carriageback to its original position. The spring 18 is interposed between thecarriage 4 and the standard 19, which rises from a rearwardly-projectingarm 19, secured to the base-plate 2.

On the forward end of the carriage 4 is pivoted the trip-lever 20, itspivotal center being at 20. A spring 21, pressing against a cam 22,which is fixed to said lever, operates to hold said lever ina definitebut yielding position in relation to the carriage-frame,

this normal position being indicated by dotted lines in Fig. 1. A tappet202 is provided on the lower end of the trip-lever 20, and when saidlever is in normal position the tappet 202 engages or registers with ashoulder 152 on the hand-lever 15, thus preventing the hand-leverreturning and in this manner hold the clutch-sleeve 13 into engagementwith the pulley 7. A stop 23, fixed to the guide 3, is s0 situated as tobe impinged by the trip-lever 20, which will move the `said trip-leverto ythe full-line vposition shown in Fig. 1, this movement disengagingthe tappet 202 and shoulder 152,which will permit the hand-lever to movesufficiently to disengage the clutch 13 from the pulley 7.

Journaled slightly forward of the shaft 5 in the bearings 24 is theshort rock-shaft 25, to which is rigidly secured the hammer-helve 26. Onthe shaft 5 is rigidly secured the tappet-wheel 27, which imparts avibratory vmovement to the hammer-belve, the springs 28 and 29 operatingto give effectiveness to the blow. The outer end of the helve 26 isprovided with a double split head 26', bilaterally arranged, in whichtwo tool-stocks 30 are securely held. These tool-stocks 30 receive theserrating-bits 31,which are secured in place by means of the set-screw30', while the bolt 262 secures the tool-stocks firmly in position, thesplit head 26l enabling a tight grip to be effected. In Figs. 3 and 4the construction of the hammer-belve and double head is clearly setforth, also the shoulders 26u and 26b of the said helve, against whichbear the springs v28 and 29. This construction of the head 26 willenable the two serrating-tools to be placed closely together, as isrequired in operating upon ledger-plates.

In Fig. 9 will be seen the arrangement of the serrating-bits 31 and themanner in which they advance on the convergentW sides of theledger-plate, the dotted lines indicating their position after havingcompleted their operation on the plate.

To hold the ledger-plate in proper position while being operated upon. asmall bed-plate 32 is fixed to the base-support 1, and on this plate isadjustably secured the ledger-plate holder 33. The upper surface of theledgerplate holder is formed on an angle, as shown in the severalfigures, and is provided with the pins 33 at its upper end and the pin332 at its lower end, the function of which is to secure theledger-plate against lateral movement. As the ledger-plate is narrowerat its upper than at its lower end, it follows that since theserrating-tools have the engaging edges of their bits angularly inclined(see Fig. 10) t0 correspond .with the angle of the margin of theledger-plate thehammer would drop lower'before engaging its work. Henceto preserve a uniform length of stroke of the hammer-belve the uppersurface of the plateholder 33 is formed on the angle, as shown.

To firmly hold the plate down on the plateholder during the operation, aspring-actuated arm 34, with its pivotal axis formed by the rock-shaft34, is provided. A rearwardlyextending arm 342 is rigidly secured to theend of the rock-shaft, the end of this arm connecting with a link 343,which engages with a suitable foot-lever 344, such as shown in Fig. 11,and within convenient reach of the operator. A compression-spring 35reacts between the base-support 1 and the rearwardly-extending arm 342,which operates to press the arm 34 firmly down on the ledger-plate.

The ledger-plate holder 33 is symmetrically arranged with respect to thehammer-belve 26, so that both sides of the said plate will receive theirserrations uniformly and simultaneonsly.

To raise the tools from their work an amount sufficient to permit thewithdrawal of the ledger-plate when finished, a hammer-lift 36 issecured to the upper side of the hand-lever 15, (see Fig. 12,) thishammer-lift being so IOO IIO

arranged that when the clutch mechanism is thrown out the movement ofthe said leverl, carrying with it the hammer-lift 36, will cause thelatter to crowd under the hammer-belve and lift the same.

In Fig. 12 the dotted lines indicate the position of the hammer-belve 26before it has been engaged by said lift 36, while the full lines showthe position after engagement. rIhe engaging side of the lift is shownbeveled to enable it to more readily crowd underneath the said helve. l

The operation of the device is as follows: rIhe arm 34 is raised throughthe rock-shaft 34', the arm 342, and the link 343, connecting with afoot-lever, (not shown,) and by means not shown, but preferably actuatedby the same lever, the half-nut 12 is depressed, permitting the spring18 to draw the carriage 4 back to its initial position, the clutch beingout of engagement, as shown in Fig. 1. The operator, with his foot yeton the lever, then removes the ledger-plate just operated upon andplaces a new blank on the ledger plate holder 33 and within the pins 33and 332. The foot-lever is then released, allowing the arm 34 to pressagainst the ledger-plate and the half-nut 12 to engage the lead-screw10. The handle of the lever 15 is then moved to the right or toward thelead-screw, thus engaging the clutch-sleeve 13 with the drive-pulley 7.This movement of the lever 1.5 will also cause the shoulder 152 torelease the trip-lever 2O and permit it to take the position indicatedby dotted lines in Fig. 1, it being remembered that the carriage is nowin its returned position, and hence the stop 23 does not interfere withthe said trip lever. As soon as the clutch is engaged the carriage willat once begin to advance, the hammer-helve 26 being rapidly vibrated bythe tappet-wheel 27. The bits 31 are set to make the serrations at theproper angle, as will appear from an inspection of Fig. 9. Theinclination of the engaging edges of the bits is such as-to conform tothe bevel of the ledger-plate, and hence room will vbe .left above saidplate for the reception of the arm 34, as will be made clear byreference to Fig. 10. Concurrently with the serrating-tools reaching thenarrow end of the ledger-plate the trip-arm 20 will have impinged thestop 23, moving said trip-arm to theposition shown by full lines in Fig.1.

l This will cause the tappet 2()2 to no longer lows that any slightvariations in the size of the ledger-plate or any slight variation initsposition upon its support will result in one bit of the serrating-toolstriking harder on one side of the ledger-plate than on the other andpossibly prevent contact on one side altogether. rIo avoid suchconsequences, the ledger-plate is held in such a manner as to bevslightly movable laterally, which will permit it to adjust itself to therigidly-held tool.

In Fig. 13 is shown the ledger-plate holder 33, the pins 33/ and 332mounted thereon for securing the ledger-plate against lateral movement,and the ledger-plate resting therein. It will be seen that the pin 332is of a diameter somewhat less than. the diameter of the circular sectorinto which it lits, while the pins 33 do not fit closely against thetongue of the ledger-plate. In this manner suflcient provision is madefor the slight amount of lateral movement required.

What I claim as my invention, and desire to secure by Letters Patent,is-

1. In a serrating-machine, in combination, a vibrating hammer,bilaterally-arranged serrating-tools secured to said hammer for actingsimultaneously on both sides of the ledgerplate, means for holding inposition the said .ledger-plate While being operated upon, actuatingmeans for said hammer, and means for producing a relative feedingmovement between the serrating-tools 4and ledger-plate.

, 2. In a serrating-machine, in combination, a reciprocating carriage, avibrating hammer mounted thereon, bilaterally-arranged serrating-toolssecured to said hammer, actuating mechanism for said carriage andhammer,

IOO

and means for securely holding in position the piece being operatedupon.

3. In a serrating-machine, in combination, a reciprocating carriage anda single hammer mounted thereon, means for reciprocating said carriageand for actuating said hammer, two serrating-tools bilaterally arrangedon the free end of said hammer for acting simultaneously on both edgesof the ledger-plate, and means for holding in position theledger-plateoperated upon.

4. In a serrating-machine, in combination, a reciprocating carriage,avibrating hammer mounted thereon, bilaterally-arranged serrating-toolssecured to the free end of said hammer and advanced thereby in adirection longitudinal of the ledger-plate and angularly with respect tothe margin thereof, actuating mechanism for the said reciprocatingcarriage and hammer, and means for securely holding in position theledger-plate operated upon.

5. In a serrating-machine, incombination, a reciprocating carriage, avibrating hammer IIO IZO

mounted thereon, bilaterally-arranged serrat- ISO arranged to lie upontheledgcr-plate beneath riage and hammer, and a ledger-plate holder 10the upwardly-inclined engaging' edges of the inclined upwardly towardits narrow end for serrating-tools for holding said ledger-platesecurely holding in position the plate being in position while beingoperated upon. Operated upon.

6. In a serrating-machine, in combination, a reciprocatingcarriage,avibrating hammer ROBERT F MAbSA mounted thereon, twohilaterally-arranged Witnesses: A serrating-tools secured to the freeend of said MARGARET A. vSWEENEY, hammer` actuating mechanism for saidcar- J. C. WARNES.

